Yahya ibn Khalid
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Yahya ibn Khalid was the most prominent member of the Barmakid family, serving as provincial governor and all-powerful long-time vizier to Caliph Harun al-Rashid before his abrupt fall in 803. Wikipedia
Died: 806 AD, Abbasid Caliphate
Parents: Khalid ibn Barmak
Children: Ja'far ibn Yahya, Al-Fadl ibn Yahya, and Musa ibn Yahya
Grandchild: Oraib